sumpfralle:

The [[https://www.mjmwired.net/kernel/Documentation/gpio/sysfs.txt|sysfs documentation]] of the GPIO interface contains the following note regarding the "directions" interface:

Note that this attribute will not exist if the kernel doesn't support changing the direction of a GPIO [..]

Thus I assume, that the direction of the two pins of the above Mikrotik devices are not configurable.

Thus before the referenced commit, the write access to "direction" failed, but it was remedied by the successive write access to "value". Now we only write to "direction", thus there is no write access to "value" anymore, which could fix the situation for fixed-direction GPIOs.

Probably we should check if "direction" is missing and write to "value" directly, in this case.

mkresin:

Depending on your preference, please build an image including the last two commit from the master branch of [[https://git.openwrt.org/?p=openwrt/staging/mkresin.git;a=summary|my staging tree]] and test if the issue is fixed for you.

Alternatively use a precompiled image from https://www.kresin.me/files/ar71xx/ which includes the mentioned commits.

joaochainho:

Hi @mathias, I've tested your commits and they fix the issue. GPIOs are now being set up correctly.
Many thanks!